Do I have to respond to the email for checking software licence compliance with a web licence?

The entire customer base of FRILO and DC was contacted with the email to check software licence compliance. The e-mail implies neither an explicit accusation nor a concrete case of suspicion. Nothing is further from our minds than placing our customers under general suspicion. We are aware that the vast majority of our customers have been using the FRILO software properly and in accordance with the licence terms for many years. If you use the software in accordance with the terms of use, you can ignore the e-mail. If you use the software via a web licence, the licence-compliant use of FRILO is guaranteed. An additional check on your part is not necessary.